Wrench.



rare-s PATENT tries.

JOHN H. GOES, OF WVOROESTER, MASSACHUSETTS, ASSIGNOR TO THE GOESTVRENOI-I COMPANY, OF SAME PLACE.

WRENCH.

SPECIFICATION forming part of Letters Patent No. 638,958, dated December12, 1899.

Application filed October 9, 1899.

To all whom, it may concern.-

Be it known that I, JOHN H. OOEs, a citizen of the United States,residing at Worcester, county of Worcester, State of Massachusetts, haveinvented an Improvement in renches, of which the following description,in connection with the accompanying drawings, is a specification, likeletters on the drawings representing like parts.

This invention has for its object to improve the construction of thatclass of wrench in which one jaw slides on the shank of the other jaw,my improvements being directed more particularly to the means of keepingin registered position with relation to the main jaw thescrew-sustaining collar, the latter being held in place through theapplication of the handpiece to the shank of the wrench.

My invention comprehends a wrench pro vided in its shank with acollar-positioning shoulder and at one edge with a partial screwthread,a collar, and a handpiece provided with a partial screw-thread tocooperate with the partial screw-thread of the shank, where'- by byturning the handpiece on the shank to engage the respective partialscrew-threads the handpiece may be moved longitudinally on the shank toforce the collar firmly against said shoulder and lock it in workingposition.

Figure 1 in side elevation represents a wrench embodying my invention;Fig. 2, a section in the line a Fig. 1; Fig. 3, a detail showing thelower end of the shank with the parts applied to it in section. Fig. 4shows the handpiece and collar applied to the shank, the partial threadof the shank and handpiece being disengaged; and Fig. 5 shows part ofthe handpiece and its attached partial thread and stop.

The-main jaw A, its shank A, provided with a collar-positioning shouldera, the movable jaw B, fitted to slide on the shank A, the col-. lar O,surrounding the shank and forming a seat for the end of the screw D,employed to actuate the movable jaw, are and may be as usual in thisclass of wrench. The successful operation of a wrench of this classdepends on the exact position of the collar and the fact that it bemaintained in this position. To force this collar closely against theshoulder and keep it in its registered position, I

Serial No. '73 2,989. (No model.)

have provided one edge of the shank with a partial screw-thread a,represented as an in clined notch, and I have provided one arm e of thehandpiece E with a partial screwthread e, represented as an inclinedprojection adapted to enter the notch, the notch being so located in theshank with relation to the shoulder a that a partial rotation of thehandpiece, the projection entering a notch, will cause the upper end ofthe handpiece, in contact with the lower end of the collar, to force theupper end of the collar firmly against the shoulder a. To prevent thepossible rotation of the handpiece further than necessary, I provide theprojection c with a stop 6 to contact with the arm 6. The stop also actsto aline the arms a in proper relation with the shank to enable thehandle-scales f to be applied, the usual screw f and nut f beinginserted, through the scales and the hole f in the shank. The nut h,applied to the end of the shank, is of usual construction.

Having fully described my invention, What I claim as new, and desire tosecure by Letters 7 5 Patent, is

1. The shank provided with a collar-positioning shoulder, and a partialscrew-thread and a collar applied to said shank; combined with ahandpiece having a partial screwthread to engage the partialscrew-thread of the shank, partial rotation of said handpiece causingthe collar to be forced against and held firmly in contact with theshoulder of the shank, substantially as described.

2. The shank provided with a collar-positioning shoulder and a partialscrew-thread;

andacollar applied loosely to said shank; combined with a handpiecehaving a partial screwthread, and a stop, the partial screw-thread ofthe handpiece engaging the partial screwthread of the shank and actingto'move the handpiece longitudinally on the shank to lock the collar inits operative position against the shoulder of the shank, said stopalining the arms of the hand piece and the shank for the reception ofthe handle-scales, substantially as described.

3. The shank provided with a collar-positioning shoulder and a partialscrew-thread; and a collar applied loosely to said shank, combined witha handpiece having a partial screw-thread, and a stop, the partialscrewthread of the handpiece engaging the partial screw-thread of theshank and acting to move the handpieee longitudinally on the shank tolock the collar in its operative position against the shoulder of theshank, said stop alining the arms of the handpiece and the shank for thereception of the handle-scales, handleseales applied to the shank andhandpieee,

and means to confine them in place, substan- IO tially as described.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing Witnesses.

JOHN H. GOES.

Vitn esses:

GEO. W. GREGORY, l\.[ARGARET A. DUNN.

